For the past decade, Australians have griped about the escalating cost of short-term airport parking. Accusations of monopoly pricing were leveled, and a year ago, the government got involved, having the Australian Competition and Consumer Commission (ACCC) keep an eye on parking lot fees at the country’s five largest airports. The results are amazing.

Airports pull in 11 percent of their revenue from parking. In Melbourne, it’s a whopping 21 percent, while Sydney‘s airport pulls in a more modest 7 percent of its financial take from the parking lots. Since no government agency is willing to put its head on the chopping block the ACCC would only say that this is “consistent with airports having a monopoly position.”

Of course, there are perks to paying. People parking at the Melbourne airport were the most satisfied customers, with those frequenting Sydney’s lots at the bottom.

But, convenience always wins.

The Sydney airport is only 10 kilometers (a little more than 6 miles) from the city, and only 13 percent of passengers use the airport’s parking lots. Melbourne’s airport is more than twice as far away, making airport parking more sensible.